Hydra Booking – All in One Appointment Booking System | Appointment Scheduling, Booking Calendar & WooCommerce Bookings <= 1.1.27 — Unauthenticated Arbitrary Booking Cancellation via Weak Hash Generation
CVE-2025-12787Published · Updated Action summary
Affected: ≤1.1.27Update to 1.1.28 or newer
All remediation steps- Severity
- Medium5.3
- CVSS
- 5.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:NConfidentiality- None
I:LIntegrity- Low
A:NAvailability- None
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Hydra Booking — Appointment Scheduling & Booking Calendar hydra-booking
- Affected≤ 1.1.27
- Patched in1.1.28
Update to 1.1.28 or newer.
You are affected if you run ≤ 1.1.27. Version 1.1.28 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Hydra Booking — Appointment Scheduling & Booking Calendar.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 1.1.28, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Hydra Booking — Appointment Scheduling & Booking Calendar to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Ahmad Salem (a7mad.cc).
The Hydra Booking — Appointment Scheduling & Booking Calendar plugin for WordPress is vulnerable to unauthorized booking cancellation in all versions up to, and including, 1.1.27. This is due to the plugin's "tfhb_meeting_form_submit_callback" function using insufficiently random values to generate booking cancellation tokens, combined with a globally shared nonce. This makes it possible for unauthenticated attackers to cancel arbitrary bookings via brute force attacks against the tfhb_meeting_form_cencel AJAX endpoint.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Hydra Booking — Appointment Scheduling & Booking Calendar
All 17| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium4.3 | Authenticated (Hydra Host+) Insecure Direct Object Reference ≤1.2.2Update to 1.2.3 | CVE-2026-92421 | |
| Medium4.3 | Authenticated (Hydra Host+) Insecure Direct Object Reference ≤1.2.1Update to 1.2.2 | CVE-2026-92420 | |
| Medium4.3 | Authenticated (Hydra Host+) Insecure Direct Object Reference ≤1.2.3Update to 1.2.4 | CVE-2026-92425 | |
| Medium6.4 | Authenticated (Host+) Stored Cross-Site Scripting via 'first_name' Parameter ≤1.2.2Update to 1.2.3 | CVE-2026-15948 | |
| Medium5.3 | Missing Authorization ≤1.2.2Update to 1.2.3 | CVE-2026-28188 |
- Medium4.3Authenticated (Hydra Host+) Insecure Direct Object Reference
≤1.2.2Update to 1.2.3
- Medium4.3Authenticated (Hydra Host+) Insecure Direct Object Reference
≤1.2.1Update to 1.2.2
- Medium4.3Authenticated (Hydra Host+) Insecure Direct Object Reference
≤1.2.3Update to 1.2.4
- Medium6.4Authenticated (Host+) Stored Cross-Site Scripting via 'first_name' Parameter
≤1.2.2Update to 1.2.3
- Medium5.3Missing Authorization
≤1.2.2Update to 1.2.3
Timeline
CVE published
Severity medium, CVSS 5.3
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.